pupillometrisen

Pupillometry is the measurement of the pupil’s size and its changes in response to light and cognitive or emotional stimuli. The adjective pupillometrinen describes things related to this domain, including methods, measurements, and interpretations.

Pupillometry is typically performed with infrared eye-tracking equipment or dedicated pupillometers. The pupil size is influenced by luminance, age, drugs, and autonomic nervous system activity; therefore experiments require controlled lighting and calibration. Common metrics include baseline pupil diameter, peak dilation, contraction latency, and the task-evoked pupillary response, which tracks transient dilation during cognitive processing.

Applications include cognitive psychology and neuroscience for assessing mental workload, attention, surprise, and decision making; clinical contexts such as autonomic dysfunction, neurological disease, or pharmacology (e.g., opioid effects). In human-computer interaction, pupillometry informs interface design and user experience. In marketing, pupil size can be used as an implicit measure of arousal or interest, though interpretation remains complex due to lighting and individual differences.

Limitations: results are sensitive to lighting, eye color, age, and medications; artifacts from blinks or gaze shifts can affect measurements; standardization across devices is ongoing. Data analysis often involves preprocessing to remove artifacts, segmentation by trials, and z-score normalization or mixed-model analyses.

The term pupillometrinen encompasses methods, metrics, and interpretations derived from pupillometry, reflecting the broader use of pupil dynamics as a noninvasive index of autonomic and cognitive processes. See also pupillary light reflex and eye-tracking.